You still get the benefit of
several editing passes (story development, line edits and proofing) and a professional cover.
In my experience, what most indie authors require is actually a combination of line, copy, and general editing1, not least because the cost of
the several editing passes a big publishing house would do (general / developmental edit, line edit, copyedit) can add up to several thousand dollars, a prohibitive cost for the vast majority of indies.
Every successful author I know recognizes they will need to make
several editing passes through each novel before it's ready.
Not exact matches
A line editor may have to read a manuscript
several times and go through a number of different
passes to ensure that it has been
edited to a high standard.
As indie self - published writers, we get a bad rap about this issue, but every single indie author that I know goes to great length and expense to have their manuscripts not only
edited but proofread (and usually
several proofreading
passes) and yet a reader will find errors / typos in our published books.